我厂在大批量生产中检验外螺纹中径质量时,为了满足外螺纹具有完全可靠的旋合性要求,必须按螺纹环规通端对外螺纹作用中径进行全数检验。由于环规设计给定的中径公差很小,在与产品旋合过程中会很快磨损,磨损一旦超出了公差,环规就只能报废。采用硬质合金不可调整的螺纹环规,虽然能够显著地提高它的耐磨性能,但是当其中径磨损到一定程度以后,也同 When testing the quality of the male middle diameter in mass production, in order to meet the requirement of complete and reliable screwing of the male thread, all the tests of the middle diameter of the external thread must be conducted according to the thread ring gauge. As the ring gauge design given a small diameter tolerance, with the product during the spin-on process will wear quickly, wear and tear once exceeded the tolerance, ring gauge can only be scrapped. Carbide non-adjustable thread ring gauge, although it can significantly improve its wear resistance, but when the diameter wear to a certain extent, the same